#include <stdio.h>
#include <stdlib.h>

int change(int);

int main() {
	int w, h, x, y;
	char c;

	scanf("%d %d %c", &w, &h, &c);

	for (y = 0; y < h; y++) {
		for (x = 0; x < w; x++) {
			printf("%c", c);
			c = change(c);
		}
		printf("\n");
		if (w % 2 == 0)
			c = change(c);
	}

	return EXIT_SUCCESS;
}

int change(int c) {
	if (c == 66)
		return c + 21;
	else
		return c - 21;
}